Power-shovel



H. H. HARRIS.

POWER SHOVEL.

APPLICATION FILED 1111111.15, 1919.

Patented 10011;., M9 WZL 4 SHEETS-SHEET l..

H. H. HARRIS POWERl SHOVEL.

APPLICATION man MAR. 15, 1919.

H. H. HARRIS.

Patented 0631,. H9 11921-m 4- SHEETS-SHEET 3.

HUTJLT@ H. Mmmm, @E TIOEtATN, OHIO, ASSIGNOH T0 THE THEW @E LORATN,OHIO, A COBPORATIIN UF @mtl SHVEL UQMJFAATW,

rownnfanonnn pecicaticn of Letters Patent.

Patented wet. Til, T924..

Application fled March 15, i919. Aerial Ito. Watan.

To all 'whom it may concern.'

Be it known that I, HOLLIS H. Hannie, a citizen of the United States,residln at Lorain, in the county of Lorain and btate of hio, haveinvented a certain new and useful Improvement in Power-bhovels, of whichthe following is a full, clear, and exact description, reference beinghad to the accompanying drawings.

This invention relates to steam shovels and the like wherein a dipperstick is employed which is caused to travel bodily. to crowd the dipperinto the earth, there being mechanism for raisinr and withdrawing thedipper stick in accordance. with the customary operation of suchdevices. The present invention is concerned particularly with such anarrangement of the mechanism of such a device that it may beparticularly compact vertically and still be eiiicient and rapid inoperation, whereby the device may be conveniently used in tunnels, minesan'd similar places where the overhead room is very limited. The novelcharacteristics of the present invention are hereinafter more fullyexplained in connection withthe accompanying drawings and the essentialcharacteristics are summarized in the claims.

Tn the drawings, Figure 1 is a side elevation of a steam shovelconstructed in accordance with the present invention; llflg. 2 1s a sideelevation com rising a similar view, some of the parts being broken awayto illustrate in section parts of the mechanism not shown in Fig. 1;lFig. 3 is a plan of the steam shovel; Fig. 4 is a substantial axialsection through a gearing mechanism foradvancing and withdrawing thedipper carrier; ig. 5 is a fragmentary sectional plan of the dipperslide taken on the line 5--5 of Fig. 2; Fig. 6 is a vertical section onthe line 6-6 0f Fig. 1; Fig. 7 is a vertical section taken substantiallyon a plane indicated by the line 7-7 of Fig. 1.

Describing the invention, as illustrated in the drawings, by the use ofreference characters, 1 indicates a truck frame shown as supported onsuitable wheels 2. On the truck frame is revolubly supported a platform3 to which is pivoted at 4 end brackets 5 of a boom comprising sidechannel members 6 secured to the free end of which are rearwardlyextending brackets 8 attached to vertical struts 9. At the meetingpoints on a shaft 45. This shaft in of the braces 8 and struts 9 arepivotall attached links 10 pivoted at 11 to upright links 12 and in turnpivoted to bearing meinbers 14. Extending rearwardly from the pivotmembers 11 are tie rods 15 provided with turn buckles 16 and attached tobrackets 17 mounted on the platform 3 at the rear end thereof. A counterweight box 18 ia shown as mounted on the rear end of the platform andextending forwardly from the upper end of the box is shown a roof 19provided with vertical supports 20 at the forward end thereof.

At 22 is indicated a dipper suitably secured to the lower end of adipper stick 23, pivotall attached at 24 to a carrier 25, so mounte asto slide in ways formed by channel members 26 facing inwardly from andattached to the channels-6 and uprights 9.

Mounted on the platform 3 is a suitable motor. 30, on the armature shaftof which is a pinion 31 meshing with a gear 32 rigid on a shaft 33. Onthe shaft 33 is a gear 34 meshing with a gear 35, in turn driving a gear36. The shafts for this chain of c gears may be provided with suitablebearings in the bearing bracket 14. The gear 36 is shown mounted on'ashaft 40 supported at the end opposite the gear 36 on a bearing mountedon a bracket 41 and carrying a gear mechanism to be presently describedwhich includes a sprocket 42 over which runs a sprocket chain 43 leadingover a sprocket 44 y turn rigidly carries a sprocket 4 6 engaging anddriving a chain 48 anchored at one end directly to the carriage 25 andrunning over idler guide sheaves 49 and 50 and anchored at 51 to aprojection shown as rising from the carriage 25. The sheave 50 is shownas carried in a bifurcated member 53 attached to cross frame members 54between the side members 6 of the boom. Thus as the sprocket 42 isrotated in opposite directions, the carriage 25 is caused to moveforwardly and rearwardly through the chain 43,'sprocket 44 and chain 48.Assuming that the motor 30 runs in one direction only, it becomesnecessary to provide a reversing driving gearing connecting the shaft 40with the sprocket gear 42. A suitable construction for such gearing isillustrated in Fig. 4, in which a pinion gear is shown as rigidly keyedto the shaft 40 and meshes with planetary pinyat ions 61 carried onstuds 62 rigidly aixed in a brake drum member 63 rotatable about andmounted on .the shaft 40. An internal gear 65 surrounds and meshes withthe lanets 61 and is rigidly attached to a spiderike member 66 in turnsecured by bolts 67 to the sprocket 42 and having a bearing on the shaft40. It will be seen that with the shaft 40 running continuously in acounter-clockwise direction, the planets 61 will be caused to travelidly carrying the brake drum member 63 with them. Upon the stopping ofthe brake drum, however, by application of a suitable brake band, notshown, the studs 62 and consequently the axes of the planets 61 becomestationary and the gear 65. is thereupon caused to rotate carrying with1t the sprocket 42 drivin the c haln 43 1n such direction to move tecarrler 2.5 outwardly from the frame. A brake drum 70 is shownasrotatably mounted on the shaft 40 and carrying an internal gear 71meshing with planets 72, at least one of which 1s r1g1d with a stud 74carried by the splder 66, on whlch the sprocket 42 is mounted. When thedrum 70 is held against rotation the motion of the shaft 40 ma betransmitted from a pinion 75 on the sliaft, to the planets 72 causingthem to revolve within the internal ear 71 carrying the pin 74 aroundand rotatlng the sprocket 42 in a direction to accomplish the withdrawalof the carriage 25 and d1 per, moving them toward the truck and platorm.

To swing the dipper upwardly about the pivot of the dipper stick, I haveshown chains extending from drums 81 mounted on a shaft 82 supported inbearings on the uprights 9. These chains 80 wind upon these drums andare led over the guide sheaves 84 at the free end of the boom and on theoutside of the channel members 6. The chains are attached to rigid links85 ivoted at 86 to the sides of the di per, each ink being adapted toswing past 51e dipper and dipper stick in such a manner that the freeupward movement of the dipper to a point substantially engaging the boommay be accomplished, whereas were the usual single chain and bail to beused, the connection portion of the bail would engage the dipper ordipper stick limiting such upward swlng.

The drums 81 are rotated to accom lish the upward movement of the dippery a drum 90 on the shaft 82. Anchored to the drum 90 is one end of acable 91 running over and anchored to a drum 92 mounted on a shaft 93carrying the gear 35 heretofore mentioned. As the gear 35 is rotated thedrum 92 may be clutched with the shaft 93 by a clutch member indicatedat 97 in Fig. 3. This causes rotation of the drum 90 and drums 81,drawing onthe chains 80 to swing the dipper forwardly and upwardly aboutthe pivot 24. The downward movement of the dipper is accomplished bygravity, the weight of the dipper and dipper stick being sufficient toswing these drums, consequent upon the release of the clutch 97.

The swinging of the carriage platform 3 by the use of the motor 30 maybe accomplished by any suitable mechanism, for example, gearing may bemounted on the shaft 33 driving a sprocket chain 100 meshing with asuitable sprocket on the shaft 102, having a bevel gear 103 meshing witha bevel gear 104 on a vertical shaft 105. A pinion 101, shown in dottedlines in Fig. 1, as secured to the lower end of the shaft 105 may engagethe gear 108 on the truck frame to rotate the platform on the frame. Thesprocket driving the chain may be driven in opposite directions bymechanism similar to that shown in Fig. 4, suitable means, not shown,being used for holding either of two brake drums 106 or 107 againstrotation.

It will benotedl that the construction of the boom is such that itnormally stands at approximately the same height as the roof 19, wherebythe shovel may be operated in places where the over-head room is no morethan sufficient to accommodate the superstructure on the platform.

As shown, the brackets 8 are connected with the outer portions oftheside channels 6 of the boom by usset plates 110, while plates 112 areprovi ed between the braces 8 and the rear ends of the boom channel 6.These plates are preferably secured to the uprights 9 and to uprights114, serving as brace members between the braces 8 and boom channels andat the same time providing bearings for a shaft on which a sleeve 49 maybe carried. The channels 26 preferably extend outwardly past thechannels 6 an are suitably braced at their forward ends b vertical anglemembers 115, and gusset plates 116 secured to the under side of the boomchannels by angle members 117.

From the foregoing description, it will be vseen that I have provided avery compact and simple structure, which practice has demonstrated isvery well adapted for accomplishing the purposes of this invention. Inth@ usual practice of boom operations, there is provided mechanism onthe frame or platform for raising and lowering the boom or swinging thedipper stick and a separate mechanism including a steam engine ismounted on the boom itself for operating a dipper. Such mechanism,however, is `not capable of the compact arrangement shown. Accordinglyone of the essentialfeatures of this invention is the provision of meanswhereby a single motor may be used to move toward and away from theframe and alsol to raise the dipper swinging it about its pivot and anadvantage of this construction is that it lends itself readtti hlt

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incassa i ily to the arrangement of the means described for rotating theframe on the truck by use of power from the same motor on the frame.Another characteristic embodied in this invention which has manystructural advantages in accomplishing the result sought, is theprovision of substantially sep arated boom members between which thedipper stick may operate, and the arrangement of flexible membersconnected by links to the sides of the dipperand that lead over guidepulleys at the outside of the boom members, and at the free end thereof.rll`his latter feature allows the raising of the dipper stickconsiderably higher than would otherwise be practicable.

When operating in a tunnel, this advan tage is very important as it isnecessary to have the dipper considerably above a car into which theearth may be dum bed.

Having thus described my invention what ll claim is 1. 'lhe combination,with a power shovel, having a frame, an inclined boom adjustablysupported thereby with its upper end at the approximate level of theupper portion of the frame, and a dipper, of a motor, means for movingthe dipper toward and away from the frame independently of the boom,means for swinging the dipper about an axis, and mechanism forconnecting the motor with either of said means.

2. ln a power shovel, the combination of a frame having a platform, aninclined boom adjustably carried thereby with its upper end attheapproximate level of the upper portion of the frame, a dipperslidably and pivotally carried by the boom, means for sliding the dippertoward and away from the platform and boom, said means including gearingand flexible connections, means for clutching the motor with saidgearing, means for swinging the dipper about its p1vot, said meanslincluding gearing and Hexible connections, and clutch mechanism forconnecting said motor with said last mentioned means.

'3. ln a power shovel, the combination with a frame, a boom carriedthereby, ways supported by the boom at an angle thereto, a slide mountedtherein, a dipper carried by the slide, and a single means for movingthe slide and for swinging the dipper upwardly about a pivot.

4. lln a power shovel, the combination of a frame, a boom adjustablycarried thereby with its up er end at the approximate level thereof,guldeways supported by the boom and frame, a slide movable therein, adipper, a dipper' stick pivotally attached to the slide, a motor carriedby the frame and means connected 'with said motor and including clutchesfor moving said slide, and

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means operated by said motor for swinging the dipper upwardly about itspivot.

5. lin a power shovel, the combination of a frame, a boom carriedthereby, comprising separated parallel members, a slide between saidmembers, a dipper, a dipper stick therefor pivotally attached to theslide, means for actuating the slide to move the dipper toward and awayfrom the frame and boom, a flexible member attached to each side of thedipper and extending upwardly therefrom, guides for the flexible membersmounted on the outer sides of the boom members, and means for drawing onsaid flexible members.

6. ln a power shovel, the combinaticn of a frame, a boom carriedthereby, a dipper and dipper stick, means pivotally connecting thedipper stick to the boom, means for swinging the dipper upwardly towardthe boom including non-connected members attached to the sides of thedipper, flexible connections leading upwardly from said members, guidesfor said flexible connections, and means for winding said flexibleconnections to raise the dipper.

7. ln a power shovel, the combination of a frame, a dipper and dipperstick pivotally connected thereto, and means for swingmg the dipperupwardly about its pivot, said means including non-connected linksivoted to the sides of the dipper and a flexible connection attached toeach.

8. ln a power shovel, the combinatmn of a truck, a frame rotatablymounted thereon. an inclined boom adjustably carried by the frame withits upper end at the approximate level of the upper portion of theframe, a slidable carriage on the boom and movable in a directionsubstantially perpendicular to the truck, a dipper, a dipper sticktherefor pivotally connected to the carriage, and a single means on thetruck for independently actuating said carriage and said dipper.

9. ln a power shovel, the combination of a truck, a platform rotatablymounted thereon, a boom carried by the platform, a horizontal guidewaycarried by the boom, a carriage movable in said guideway, a dipper, adipper stick therefor, pivotally connected to the carriage, a flexiblemember for actuating said carriage, means for moving the flexible memberincluding gearing,4 a motor, and clutch mechanism for connecting saidgearing with the motor to drive said gearing in opposite directions,separated flexible members attached to theI sides of the dipper, guideson the boom, onto which said flexible members wind, drums therefor,gearing for actuating said drums, and clutch mechanism for connectingsaid gearing with said motor.

lin testimony whereof, l hereunto amx my signature.

HOLLIS l-l. HRRIS.

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